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Analog Devices Inc./Maxim Integrated MAX9108EUD
- Part No.:
- MAX9108EUD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX9108EUD.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
MAX9108EUD from Maxim Integrated is a quad high-speed, low-power voltage comparator designed for single +5V systems. It delivers 25ns propagation delay with 350µA per comparator supply current, ±500µV input offset voltage, and TTL-compatible outputs without external pullups. Used in threshold detection and line reception where fast, clean switching and ground-inclusive input range are required.
For engineers reviewing the MAX9108EUD datasheet, MAX9108EUD pinout, MAX9108EUD application, or MAX9108EUD equivalent, this page provides verified electrical specs, TSSOP-14 package details, latch-free quad comparator functionality, and real-world selection guidance for battery-powered and signal-conditioning designs.
Technical Context
The MAX9108EUD implements four independent bipolar comparators with internal 2mV hysteresis to suppress oscillation during slow input transitions. Each channel features rail-to-rail input common-mode range (–0.2V to VCC – 1.5V) and guaranteed TTL output drive (VOH ≥ 3.0V at 100µA, VOL ≤ 0.6V at 3.2mA).
No latch function is present-unlike the MAX9109-making it suitable for continuous comparison tasks. Propagation delay skew between channels is ≤5ns, and differential delay is ≤1ns, enabling precise timing alignment across all four outputs in sampling circuits and zero-crossing detectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV overdrive - enables sub-40MHz sampling rate in A/D front-ends |
| Supply Current per Comparator | 350µA at VCC = 5.5V - supports ultra-low-power operation in battery systems |
| Input Offset Voltage | ±0.5mV (typ), ±4.0mV (max) - ensures accurate threshold discrimination down to millivolt-level signals |
| Input Common-Mode Range | –0.2V to VCC – 1.5V - accepts inputs below ground and up to 3.5V on +5V supply |
| Output Compatibility | TTL - directly interfaces with 74LS/74F logic without pullup resistors or level shifters |
| Hysteresis | 2mV (internal) - eliminates chatter on noisy or slowly varying inputs without external components |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin environments |
Pinout & Package
The MAX9108EUD is housed in a 14-pin TSSOP package (U14-1), 5.0mm × 4.4mm footprint, 0.65mm pitch, with exposed pad for thermal enhancement. Pin 1 is marked by a dot or notch orientation indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Channel D open-collector TTL output - sinks up to 8mA, requires no pullup |
| 2 | IND– | Channel D inverting input - referenced to internal hysteresis zone center |
| 3 | IND+ | Channel D noninverting input - supports differential or single-ended configurations |
| 4 | GND | Analog/digital ground reference - must connect to low-inductance PCB ground plane |
| 5 | VCC | +4.5V to +5.5V supply - decoupling capacitor (0.1µF ceramic) required adjacent to pin |
| 6 | INA+ | Channel A noninverting input - identical electrical behavior to IND+/INC+/INB+ |
| 7 | INA– | Channel A inverting input - matched bias current (125–350nA) with INA+ |
| 8 | OUTA | Channel A TTL output - electrically isolated from other outputs; no crosstalk specification given |
| 9 | INC+ | Channel C noninverting input - shares same input structure and CMRR (50–1000 µV/V) as all channels |
| 10 | INC– | Channel C inverting input - offset voltage drift <0.5µV/°C over full temperature range |
| 11 | OUTC | Channel C TTL output - rise/fall times of 12ns/6ns into 10pF load |
| 12 | INB– | Channel B inverting input - supports common-mode voltage down to –0.2V without damage |
| 13 | INB+ | Channel B noninverting input - input bias current mismatch ≤55nA across channels |
| 14 | OUTB | Channel B TTL output - VOL ≤ 0.4V at 8mA sink, ensuring robust noise margin vs. TTL inputs |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external feedback resistors and prevents output oscillation on slow-moving signals |
| Rail-inclusive input range | Accepts inputs 200mV below GND and up to 1.5V below VCC, simplifying sensor interface design |
| TTL-compatible outputs | Direct drive of standard logic families without pullup resistors or level translators |
| 25ns propagation delay | Enables use in high-speed line receivers and 40MHz+ sampling clock conditioning |
| Quad-channel integration | Reduces board space and component count versus discrete dual-comparator solutions |
Applications
| Battery-Powered Threshold Detection | A/D Converter Input Conditioning |
|---|---|
Use Scenario: Monitoring battery voltage against multiple thresholds (e.g., 3.3V, 3.0V, 2.7V) in portable medical devices. IC Role / Device Role / Timing Role: Quad comparator providing simultaneous voltage window comparisons with hysteresis to prevent false triggers from ripple. Use Value: 350µA per channel enables >1-year runtime on coin-cell batteries; 25ns response allows real-time low-battery alerts before shutdown. | Use Scenario: Converting analog sensor outputs (e.g., thermistor, pressure transducer) into clean digital edges for successive-approximation ADC sampling. IC Role / Device Role / Timing Role: Front-end signal conditioner shaping analog inputs into jitter-free logic levels synchronized to ADC clock. Use Value: 2mV hysteresis rejects EMI-induced noise; 25ns delay ensures setup/hold timing margins are met even at 25MSPS sampling rates. |
| High-Speed Line Receiver | Zero-Crossing Detector for AC Mains |
Use Scenario: Receiving differential RS-422 or LVDS-like signals in industrial PLC backplanes with limited power budget. IC Role / Device Role / Timing Role: Single-supply quad comparator reconstructing logic states from attenuated or distorted transmission lines. Use Value: Wide input common-mode range accommodates ground offsets up to ±200mV; TTL outputs interface directly with FPGA I/O banks. | Use Scenario: Detecting AC zero crossings in smart energy meters or TRIAC dimmer control circuits operating from rectified mains. IC Role / Device Role / Timing Role: Precision timing reference generator converting sinusoidal input into synchronous square wave for phase-angle control. Use Value: ±0.5mV offset ensures crossing accuracy within ±0.01° at 50Hz; 25ns delay minimizes phase error in closed-loop power regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Slower (1.3µs propagation delay), higher supply current (500µA/comparator), no internal hysteresis, open-collector only | Suitable for low-speed, cost-sensitive industrial controls where speed and noise immunity are secondary | Select LM339DR only if design tolerates microsecond delays and can add external hysteresis resistors |
| TLV3704IPW | Lower power (800nA/comparator), rail-to-rail input, but slower (5.5µs), CMOS output (not TTL) | Better for ultra-low-power IoT sensors, but requires level-shifting for legacy TTL logic interfacing | Choose TLV3704IPW when nanowatt operation is critical and system uses CMOS logic or level translators |
Compared with LM339DR and TLV3704IPW, the MAX9108EUD uniquely balances 25ns speed, TTL compatibility, internal hysteresis, and 350µA power - making it optimal for high-fidelity signal acquisition in space-constrained, single-supply industrial and test equipment.
Availability
MAX9108EUD is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter front-ends, and line receiver designs requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX9108EUD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and high-speed ICs for industrial, communications, and consumer applications.
The MAX9107/MAX9108/MAX9109 family targets high-speed, low-power comparator applications in portable instrumentation and signal integrity-critical systems - emphasizing speed, noise immunity, and single-supply simplicity.
FAQ
What is the maximum supply voltage rating for the MAX9108EUD?
The MAX9108EUD has an absolute maximum supply voltage of 6V between VCC and GND. However, its specified operating range is 4.5V to 5.5V. Operating outside this range may cause parametric degradation or reliability issues. The MAX9108EUD is not rated for 3.3V-only operation and requires a stable +5V rail for guaranteed performance per its Electrical Characteristics table.
Does the MAX9108EUD include an internal latch function like the MAX9109?
No, the MAX9108EUD does not include an internal latch. Latch functionality is exclusive to the MAX9109 variant, which features LE (Latch Enable) and complementary output capability. The MAX9108EUD provides four independent, transparent comparators with no storage element - making it ideal for continuous real-time comparison tasks such as line reception or zero-crossing detection where latching would interfere with signal fidelity.
Can the MAX9108EUD operate with input voltages below ground?
Yes, the MAX9108EUD supports input common-mode voltages down to –0.2V relative to GND, as confirmed in its Electrical Characteristics table under "Input Voltage Range (VCMR)". This allows direct interfacing with signals that swing slightly negative, such as certain op-amp outputs or transducer signals in single-supply systems. Exceeding –0.3V violates Absolute Maximum Ratings and risks permanent damage.
What is the output drive capability of the MAX9108EUD?
The MAX9108EUD outputs are TTL-compatible and specify VOL ≤ 0.6V at 3.2mA sink current and ≤ 0.4V at 8mA, with VOH ≥ 3.0V at 100µA source current. This allows direct connection to standard TTL and LS logic without pullup resistors. The outputs are not rail-to-rail but are optimized for driving 74-series inputs with adequate noise margin, and short-circuit duration to VCC or GND is limited to 10 seconds per Absolute Maximum Ratings.
Is the MAX9108EUD pin-compatible with other packages of the same family?
No, the MAX9108EUD in 14-pin TSSOP is not pin-compatible with the MAX9108ESD+ in 14-pin SO - although both share identical pin numbering and function mapping, their land patterns differ significantly due to TSSOP's finer pitch (0.65mm vs. 1.27mm) and thinner profile. PCB layout must be redesigned when substituting between these packages. The MAX9108EUD pinout matches only other TSSOP-packaged MAX9108 variants, not SO or QFN versions.
MAX9108EUD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 5.5V
- :
- 1.6mV @ 5V
- Voltage - Input Offset (Max):
- 0.125µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- 86.02dB CMRR, 86.02dB PSRR
- CMRR, PSRR (Typ):
- 25ns
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-TSSOP
MAX9108EUD FAQ
1.How can I place an order for MAX9108EUD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9108EUD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX9108EUD reliable?
The price and inventory of MAX9108EUD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9108EUD is usually 5 days.
3.What payment methods are accepted for MAX9108EUD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9108EUD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9108EUD?
MAX9108EUD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9108EUD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX9108EUD?
For technical support, including MAX9108EUD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9108EUD requirements.
6.How does Aetrix verify that MAX9108EUD is sourced from the original manufacturer or authorized distributors?
All MAX9108EUD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX9108EUD meets industry standards.
7.What is the process for return or replacement of MAX9108EUD?
All MAX9108EUD units undergo pre-shipment inspection (PSI). If there is an issue with MAX9108EUD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX9108EUD part is unused and in its original packaging.
Return procedure for MAX9108EUD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9108EUD Tags
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LM339DR
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LM339PWR
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LM393DT
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LM2903DT
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LM393DR
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LM239DR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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